Double-drum hoist



Jly 27 1926. 1,594,173

c. c. HANSEN DOUBLE DRUM HOIST Filed Oct. l0. 1925 2 Sheets-Sheet 1 .miA

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July 27 1926. 1,594,173

C. c. HANSEN DOUBLE DRUM HOIST Filed Oct. 10. 1925 2 Sheets-Sheet 2`INVENToR., ("afz'lesl'IImza/en.

e1/5% fH/s ATTO EY.

' Patented July 27, i926.

UTED STA'MLS PATENT CHARLES C. HANSEN, OF EASTON, ENNSYLFANIA, ASSIGNORTO INGERSOLL-RAND COIVIFANY, OF JERSEY GTY, NEVI JERSEY, A CORPORATON OFNEW JERSEY.

DOUBLE-DRUM HOIST.

Application filed October 10, 1925.

This invention relates to hoists, Abut more 'particularly to a hoistofthe double drum type in which either of thedrurns may be driven from acommon driving element.

The objects of the invention are to obtain a constant and uniformbraking effect on 'the drums in order to prevent free rotation thereofafter the drums have been disconnected from the driving element, toenable the braking mechanism to be readily adjusted and to render thebraking element readily accessible for the purpose of inspection andrenewal of parts.

Other objects will be in part obvious and in part pointed outhereinafter.

The invention consists of the combinations of elements, features ofconstruction, and arrangement of parts having the general mode ofoperation substantially as hereinafter described and more particularlypointed out in the appended claims and illustrated in the accompanyingdrawings. in Which- Figure l is an elevation partly in section of ahoist constructed in accordance with the practice of the invention,

Figure 2 is a transverse view partly in section taken through Figure 1on the line 2-2 looking in the direction of the arrows, and

Figure 3 is a perspective view of the paWls illustrating the manner inwhich said paWls are held against relative rotation.

Referring to the drawings, A indicates a base plate which supports atits ends fra-mes B and C. The frames B and C may be secured to the baseplate A in any suitable manner and are connected lrigidly at their topsby a tie-rod D which is threaded at its ends to receive suitable nuts E.

Formed integrally With the frame C is a box F which forms a mounting fora motor G. rlhe motor G is in this instance of the square cylinder typein which one biston is adapted to reciprocate Within another piston.Accordingly a piston H reciprocates transversely Within a cylinder J anda second piston K is arranged to reciprocate y vertically Within thepiston H. In this Way the combined movements of the pistons H and K areresolved into a rotary movement for rotating a driving shaft L which inthis instance is connected to the piston K by means" of a ,crank pinO.Since theimotor 'illustrated in the" drawings forms nopart ofpre'sentinveiition and its construction Serial No. 61,636.

and operation are Well understood, further description thereof isconsidered unnecessary, and it is to be .understood that any suitablereversible motor of compact type may be used for rotating the maindriving shaft L.

ln the present instance, the main vdriving shaft L is supported at oneend by the frame C and extending longitudinally through the hoist issupported at its other end by the frame B. Encircling the driving shaftL is a center bearing P also supported by the frames B and C and whichforms a support for a haulage drum Q. and a tail rope drum R mountedside by side and adapted to roL tate upon the center bearing P. Onadjacent sides of the drums Q and R are formed flanges S and Trespectively which carry drum drivers U and V. The drum drivers U and Vare in the form of teeth having op posed engaging faces, and, ifdesired, may be formed separately and 'secured to the flanges S and T inany convenient manner.

Arranged rotatably on the center bearing P and between the drums Q and Ris a main driver N preferably in the form of a spur gear which meshesWith a pinion X keyed to a counter shaft Y. The counter shaft Y in thisinstance is provided With anti-friction bearings Y and Y2 supported bythe frames B and C respectively and projects at one end'into a gearcasing Z preferably formed integrally with the frame B. A cover B Whichmay be secured firmly to the frame C in any suitable manner serves tohold the bearing Y2 in the frame B and forms a pocket or reservoir foroil or other lubricant for the bearing Y2. A gear ZJ is keyed to theshaft Y to mesh with an intermediate pinion c formed integrally with ashaft d and supported at one end by the frame B and at .its other end bya plate e which forms a cover for the gear casingA Z. Keyed to the shaftcl adjacent the pinion c is an intermediate gear f which meshes with adriving pinion g keyed to the main driving shaft L.

A boss L is formed on the main vdriver W and is bored to receive abushing j having an inwardly extending iiange intermediate its ends.Disposed Within the bushing j are a pair of pawls o and p havingtrunnions g and r Which extend rotatably into the bushing j and thusprovide "pivotslfor said pa'wls.- @latch members s Vpreferably)ofseinifoireular shape, are formed on the trunnions g and r to interlockwith each other when the pawls are in their normal position so that thepaWie o and pxvili be simultaneously rocked about their pivot. The'portions comprising the clutch members s are in this insta noe oismaller diameter than the trunnions g and r thus forming` shoulders u,

which, When the pawls are" in their proper position in the busiiingj,will abut the tiange vv/12 and thus preyentthe trunnions :tronislidinglongitudinally Withinthe bushing f,i.A z ,The paivlsoand p inthis instance areidentieaiiy alike so that if one ofthe pawls issubjected to harder usage than the otherrpaivl, as is frequently thecase, the pawls may be interohanged, e v

, In order to porghoid the eluteh meinbersis Constantly inengragenientjvith each other, a boit o is extended through seidtrunnionsanjd balsa nut infor clamping4 said pamvlsin relativeposition.VEhe bossi and thebushing,` areinthis instance relieved as at es topermit tree oeillation of A.the pe wvls, ,in this Way a shoulder Q/ 4isIornied rearwardly ofeaehpaWll to torni a support for thepawls when saidpawls engage the drum drivers.i

Suitable brakes, are usually. provided in hoists of this typeiior.preventing; reerotationot the drums when they are disconneetedv-fronrthe drivingI elernent, ln the present i1 1stant e, semi-eireular bends eare arranged to bearagainst the flangesi'by and T, preterablyibeneathsaid ianees, and Carry at thei ends screws 2 and flfhe'eereiv isprovided with a pair otadjusting n nts and extends through abraeirettpreferably piroted on a yoke 5,' Whieh yokeinrthisjnstance, issupported by the rod to partly enoirole the inain driver WT and is heldagainst endxvise inoveinent by suitable spaeers D interposed betweensaid yoke and theendfraines B and@ -norder to. hold the-yokeegainstosoillatory movement on the roti. i) one end of the yoke isseeuredto an arm irforined onl the basen, The yother end-01"* theyole issupported by el strap C eeeuredtothe base A -by boltsCg, The niezrns-Wherebythe yoke 5 is secured to the strap Cf maybe a suitabie` pin C3which also forinsa, pivot for the braelet i. `The screw *endethrouglnthe yoke and like the sieiv 2l screw threaded ,at its tree endto reeeive a;thnnib nut 7 whereby the band may be tighten/ed. v

Ln `the opera-tionof .the hoist, assuming that .the drivinGT Shaft LiSibeinglQleCl ,in eeounterelockwise. direetio-n, rotary motion Ot AthShaft' this; diretti 5111 11 Ci. 1V

forced into engagement4` withl the drinn driver V and rotate the drum R`with said main driver. VlUpon reversal of the main drivingshaft L thedirection of rotation of the inni driver will also be reverecd, thusdisconnecting; the pavvl o troni the drinn driver V and sin'iultaneouslyactuatingl the pavvi j) into engagement with the drum driver U on thedruin Q and rotate said drinn Vith the niziin driver.

l'ronrtlie foregoingiitjvill beseen that the on of rotitionofeith'er`-drunriis at all tiines o ounterto-the Ytlireotioi'iotrotation of the main drivinpfshait After one re other of thedrulnshave been diseonneeteg troni rnairrdriven said driiin'e'- will be'h`eld-fag'ai1ist' free" rotation Vby the br' king at ienjot the bandse,' it being` understood that the bands e are'preferably sonadjnstedesto eXertJa eonstant braking effet-ten thfev tlanges@ and T," Vheneverthe brai-e bands e "beoon ief somewhatWorn, they inay b'elreadily.adjustedjto grip the MUSE. OSQiQS/@y b5. vlflflifmli". Sefwng dow-H thethumb-,11,11% 7iA .Qn fhe'SQlVS 31g By thistorniofoonstruetion, t ebrakingjnieohan n is at a ll times;aciessible'-for' purpo ofinspeetioirand' ne v partslinay' vbe substituted for Worn'parts With a'minimum expenditure of' tirne.l

v;l. in a hoist, the lConilfnation of areversibleniotor, a driving!"shaft 1connected to be rotated byy theinotor, end frames supl'gortingthe driving` shaft',afpa ir of druins rotatable about the driving'shaft', a' .1nain driverbetnfeenthe;druinsrconneeted to berotat'e'd bythe driving` shaft, elutc'h rneinbers carried by the ,main driver forselectively eonnecting one'or .tl'ieother of thedruins to be driven bythev niain driver, ianges carried by the drinne, a' tie rdeonneoting theend trainee, yoke .supported bythe tiered, and braking ineensV pivote'dto thepyolr'e V Coenert a braking eiieet`-o1i` the 'rgesv for checkingthe rotation of the drinne uponthe release of the .diiiins'from'thenieindriver. A

2. In a hoist, the oinbinatienoff a reversible inotor, a driving shfteonneoted to' be rotatedb f' the motor, end trainee the driving shaft,apair of drums rotatable about the driving' sliaita maindriverbetiflfeen .thedrinne eonneeted to be rotated -by the di shaft,@hitchy nieinberls"oa'riied'by the .i n .in driverl for Selectix'elyCf'iiinedting` one I or the other of the vdriiins, al ltiel `rodoonnbeting the upperends Qttheend iframes, a' reke-Supportefl bylihelirQCl-rri'ly .@11-

Circiingj the niain driver, means for pre.

3. In a hoist, the combination of a reversible motor, a driving shaftconnected to be rotated by the motor, end frames supporting the drivingshaft, a pair of drums rotatable about the driving shaft, a main driverbetween the drums connected to be rotated by the driving shaft, clutchmembers carried by the main driver 'for selectively connecting one orthe other of the drums to be driven by tbe inain driver, flanges onadjacent ends oi: the drums, a

tie rod connecting the upper ends of the end frames, a yoke supported bythe tie rod partly encircling the main driver, means for preventingoscillation of the yoke, and semicircular brake bands pivoted to theyoke extending beneath the flanges to act constantly against the flangesfor preventing free rotation of the drums When the drums aredisconnected from the main driver.

In testimony whereof I have signed this speciication. y

CHARLES C. HANSEN.

